Commonly Used Types of SMPS!by Avinash Mittal Blogger
The power supply circuit in an electrical and electronic circuit plays a crucial role in supplying power to the whole circuit. The different circuits demand various types of power at different phases and characteristics. So, the power needs to be changed into the required form by adopting different power converters. Different types of circuits work with various power supplies such as SMPS to manage the requirement. The term SMPS stands for switch mode power supply, Alternate Current to Direct Current power supply, high voltage power supply programmable power supply, AC power supply, and UPS (uninterruptible power supply).
When the power supply is involved in switching regulator to change the electrical power from one form to another with required characteristics, the circuit is called SMPS. It is a complex circuit that supplies a source to the loads. SMPS is an essential converter used in different appliances which consume power. It can also be used in doing electronic projects.
The different types of SMPS commonly found are:
The main power received from AC main is resolved and filtered as high voltage DC. It changes at a tremendous speed and is fed to the step-down transformer's primary side. The filtered and rectified output reaches the minor side of the transformer. Once there, it is now sent to the output of the power supply. A sample of this is also sent back to the button to control the final voltage.
In a forward converter, the choke produces the current whether or not the transistor is leading. The diode carries the current through the OFF side of the transistor. Thus, with the flow of current into the load during both periods, the choke starts storing energy during the ON period and allows a passage of energy into the output load.
In this type of SMPS, the inductor's magnetic field supplies energy throughout the ON mode of the switch. The energy collapses into the output voltage circuit when the button is in an ON state. The duty cycle controls the final output of the voltage.
Self-Oscillating Flyback Converter
This is the simplest type of converter based on the principle of the flyback. Throughout a switching transistor's conduction time, the flow of current through the transformer first switches, ramping up linearly with the angle equal to Vin/Lp. The prodcued voltage in the secondary end and the feedback end makes the fastest recovery rectifier reverse biased and switches the conducting transistor in an ON mode. When the primary current touches the peak of the input (Ip), the core activates to saturate, and the current begins to increase very sharply. The fixed base drive is incapable of supporting it through the feedback winding. As a result, the switching activates to exit the saturation.
Created on Dec 4th 2020 05:07. Viewed 202 times.